Asterisk Blog

ARIMedia

Approaches to Transcription

I should just be able to tell it what I want it to do. As the cost comes down for live transcription and the quality ...
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ArchitecturePerformance

The case of the blocked AMI Stasis subscription

Manager is an API that has been in Asterisk for almost as long as Asterisk has existed. It provides a mechanism to see what is ...
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ArchitectureAsterisk 16

transport-cc: Improving feedback for better video quality

I’ve previously written about REMB, or receiver estimated maximum bitrate, and its effect on video quality. While this provides periodic feedback from receivers to Asterisk ...
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Testing

Continuous Integration Update

Back in December in my The Continuing Saga of Continuous Integration blog post I wrote about how we reduced the Testsuite’s “27” layers of file ...
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DocumentationHow To

Changing CHANGES (and UPGRADE.txt)

Overview For those of you who have been around for a while now and contribute to the code base, you probably know about CHANGES and ...
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Architecture

res_mwi_devstate: Presence subscription for voicemail mailboxes!

In Asterisk we have an API called device state. As the name implies this allows a device (such as a PJSIP endpoint) to provide notification ...
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Architecture

Developer Notes: Large Number Storage

I ran into a curious problem the other day while working on an issue involving the storage, manipulation, and conversion of large number values in ...
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ARIDocumentation

Stasis Improvements: Goodbye Dialplan!

Overview One of the topics of discussion every year at Astricon is not needing to use the dialplan in order to use Stasis. This involves ...
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Uncategorized

Did you know you can use “@” variables in pjsip.conf?

You probably already know that you can use the “set_var” parameter on pjsip endpoints to add variables to a channel using that endpoint but did ...
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ARIDocumentation

Filtering Event Types in ARI

Since the arrival of the Asterisk REST Interface (ARI) requests have been made to allow for event type filtering capabilities. Consumers have wanted a way ...
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ArchitectureDocumentation

Asterisk INLINE Optimization

Asterisk developers who have made use of one of our function attributes called “force_inline” should be aware we are discouraging it.  Why? Let’s get to ...
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ArchitecturePerformance

R.I.P. Media Index Cache!

If you’ve been concerned about slow Asterisk startup times or excessive memory utilization, we’ve got some good news for you.  We’ve eliminated the media index ...
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ArchitecturePerformance

stasis: Statistics CLI Commands

Previously on this blog I talked about a new feature to internally filter messages in our internal message bus, as well as a new caching ...
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New PJSIP Logging Functionality

When PJSIP support was written for Asterisk we naturally needed the ability to display the SIP messages being sent and received. This took the form

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Dana and Asterisk, part 2

A couple of weeks ago, Dan Jenkins kindly wrote a guest blog post about Dana — an up-and-coming open source project which helps to highlight

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Improving Core Dump Analysis

Within the Asterisk project we are constantly trying to improve our processes and data collection when a problem is encountered to reduce the back and

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